J.B. Extreme Merino Wool / Silk Supreme Hiker (2 Pairs) Content: 50% Solarmax, 28% Merino Wool, 14% Nylon, 3% Elastic, 3% Silk, 2% Lycra Silk - Very soft and smooth can be worn year round Merino Wool - Padded Sole, Leg & Arch support - For superior fit Solar Max - Wicks away moisture